tdd

name	tdd
description	Test-driven development loop. Run a test, show errors, fix, repeat until passing. Use when the user says "tdd", "test driven", or wants an iterative test-fix cycle.
user-invocable	true
argument-hint	<test-file-path>

Delegation: Use the Agent tool to dispatch a tester agent with model: sonnet for this task.

TDD Loop Workflow

1. Identify Test File

Extract the test file path from $ARGUMENTS.

2. Run Test

Use mcp__tml__test with:

• path: the test file
• verbose: true
• no_cache: true

3. Analyze Result

If the test passes: Report success and ask if the user wants to write more tests.

If the test fails:

• Parse the error message
• Identify whether it's a:
  • Compilation error → show the error, suggest a fix
  • Runtime error → show the assertion failure, trace the issue
  • Codegen error → emit IR for the test file to debug
• Present the error clearly and suggest a specific fix

4. Loop

After the user makes changes (or you make changes), re-run the test automatically.

Repeat until the test passes.

IMPORTANT

Follow the incremental test development rule from CLAUDE.md:

• Write 1-3 tests at a time
• Run after each batch
• Fix errors before writing more tests